Rate Maximizing with Adaptive Bit Partition in Cooperative Distributed Antenna System

In multi-user cooperative distributed antenna system (DAS) with limited feedback, multi- user interference (MUI) within the service cell and inter-cell interference (ICI) from adjacent cells are inevitable because of the quantization error. Considering this, we propose an adaptive bit partition scheme,which allocates more bits to quantize the stronger interference channels and changes with channel conditions. Based on our derived upper-bound of average data rate loss, the simulation results show that the proposed scheme has at least 0.5~1dB rate improvement than other average-bit partition schemes, especially in high signal to noise ratio (SNR) region.